FI80097B - VALS I PRESSPARTIET AV EN PAPPERSMASKIN OCH FOERFARANDE FOER FRAMSTAELLNING AV DENNA. - Google Patents
VALS I PRESSPARTIET AV EN PAPPERSMASKIN OCH FOERFARANDE FOER FRAMSTAELLNING AV DENNA. Download PDFInfo
- Publication number
- FI80097B FI80097B FI882006A FI882006A FI80097B FI 80097 B FI80097 B FI 80097B FI 882006 A FI882006 A FI 882006A FI 882006 A FI882006 A FI 882006A FI 80097 B FI80097 B FI 80097B
- Authority
- FI
- Finland
- Prior art keywords
- roll
- coating
- carbide
- matrix
- advantageously
- Prior art date
Links
- 239000011248 coating agent Substances 0.000 claims abstract description 43
- 238000000576 coating method Methods 0.000 claims abstract description 43
- 239000011159 matrix material Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 22
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims description 25
- 150000001247 metal acetylides Chemical class 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 15
- 239000011651 chromium Substances 0.000 claims description 14
- 230000003746 surface roughness Effects 0.000 claims description 14
- 229910052804 chromium Inorganic materials 0.000 claims description 12
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 229910052721 tungsten Inorganic materials 0.000 claims description 8
- 239000010937 tungsten Substances 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- -1 tungsten carbides Chemical class 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 230000006698 induction Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 238000007751 thermal spraying Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 238000010298 pulverizing process Methods 0.000 claims 1
- 238000004804 winding Methods 0.000 claims 1
- 239000010438 granite Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 2
- 229920001875 Ebonite Polymers 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910003470 tongbaite Inorganic materials 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/08—Pressure rolls
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/02—Rolls; Their bearings
- D21G1/0246—Hard rolls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Paper (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
- Luminescent Compositions (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
Description
80097 Ί Tela paperikoneen puristimessa ja menetelmä sen valmistamiseksi80097 Ί Roll in a paper machine press and method of making it
Vais 1 presspartiet av en pappersmaskln och förfarande för framställnlng av denna 5Only 1 press party for the paper machine and for the first time in the room 5
Keksinnön kohteena on paperin valmistuksessa käytettävä tela, esimerkiksi puristimen keskitela tai kalanteritela, jonka kanssa raina on suoraan kosketuksessa ja josta raina irrotetaan, jonka telan sylinteri-10 vaipan päälle on muodostettu pinnoite, joka on osittain metallista ja johon myös sisältyy keraamista ainetta.The invention relates to a roll for use in the manufacture of paper, for example a press roll or a calender roll with which the web is in direct contact and from which the web is detached, which roll has a coating formed on the cylinder-10 shell which is partly metallic and also contains a ceramic substance.
Keksinnön kohteena on myös menetelmä keksinnön mukaisen telan valmistamiseksi.The invention also relates to a method for manufacturing a roll according to the invention.
1515
Tunnetusti paperikoneen puristinosassa käytetään kivitelaa, joka on tehty graniitista. Graniitin suosio perustuu sen pintaominaisuuksiin, jotka saavat aikaan hallitun paperirainan Irtoamisen kiven pinnasta. Lisäksi graniitti kestää hyvin kaapimen kuluttavaa vaikutusta.It is known that the press section of a paper machine uses a design made of granite. The popularity of granite is based on its surface properties, which cause the controlled paper web to detach from the stone surface. In addition, granite withstands the abrasive effect of a scraper well.
2020
Graniitilla on kuitenkin erältä haittoja. Luonnonmateriaalina sen ominaisuudet vaihtelevat ja graniitin sisäiset viat ja taipumus halkeiluun muodostavat vakavan esteen sen käytölle eräissä sovellutuksissa. Lisäksi granilttitela on painava, mikä lisää rakenteiden värähtely-25 taipumusta. Kivitelan paino heijastuu myös paperikoneen nostolaitteiden ja perustuksien mitoitukseen.However, granite has some drawbacks. As a natural material, its properties vary and the internal defects of the granite and the tendency to crack form a serious obstacle to its use in some applications. In addition, the granite roll is heavy, which increases the tendency of the structures to vibrate. The weight of the stone roll is also reflected in the dimensioning of the lifting equipment and foundations of the paper machine.
Ennestään tunnetaan myös synteettisiä kiviteloja, jotka periaatteessa ovat polymeeripintaisla teloja, jossa kovakumln tai polyuretaanin sekaan 30 on lisätty kivijauhetta, kuten kvartsihiekkaa. Näiden telojen haittana on ollut paperirainan liiallinen tarttuminen telan pintaan sekä huono mekaaninen kestävyys.Synthetic designs are also known, which are in principle polymer-coated rolls in which stone powder, such as quartz sand, has been added to the hard rubber or polyurethane. The disadvantages of these rolls have been the excessive adhesion of the paper web to the surface of the roll and the poor mechanical strength.
Hakijan Fl-patentissa 70273 on esitetty puristintela, jonka pintakerros 35 on muodostettu metallijauheen ja epäorgaanisen aineen seoksesta. Metallin tehtävänä on toimia sideaineena ja lisätä telapinnoitteen sitkeyttä. Epäorgaanisen aineen tehtävänä on saada aikaan kulumlskestävä, pinta- 2 80097 1 energialtaan sopiva pinta, koska telan pinnan plntaenergian on oltava tietyissä rajoissa, jotta paperirainan irtoaminen puristintelan pinnasta on hallittua.Applicant's F1 patent 70273 discloses a press roll having a surface layer 35 formed of a mixture of a metal powder and an inorganic substance. The function of the metal is to act as a binder and increase the toughness of the roll coating. The function of the inorganic material is to provide a wear-resistant surface with a surface energy of 2,80097 l, since the surface energy of the roll surface must be within certain limits in order to control the detachment of the paper web from the surface of the press roll.
5 Hakijan FI-patenttihakemuksen 853544 mukaisessa telassa sopiva pinta-energia on vielä paremmin toteutettu, niin että metallikomponentti on nimenomaan kromia sisältävä ruostumaton teräs, kromin osuuden metallista ollessa 9-35 %. Runsaasti kromia sisältävä ruostumaton teräs on hydrofiilinen aine (kromi lisää hydrofiilisyyttä). Toisaalta kromi-10 seostuksella saatiin rakenteeseen kulumista kestäviä kromikarbideja.In the roll according to the applicant's FI patent application 853544, the suitable surface energy is even better realized, so that the metal component is precisely chromium-containing stainless steel, the proportion of chromium in the metal being 9-35%. Chromium-rich stainless steel is a hydrophilic substance (chromium increases hydrophilicity). On the other hand, chromium-10 alloying gave wear-resistant chromium carbides to the structure.
Kromi lisää myös teräksen korroosiokestävyyttä. Tällaisessa "seoksessa" keraaminen aine erkautuu itse teräksestä kromikarbidina.Chromium also increases the corrosion resistance of steel. In such an "alloy", the ceramic material separates from the steel itself as chromium carbide.
Esillä olevan keksinnön ensisijainen tarkoitus on saada aikaan 15 tela ja menetelmä sen valmistamiseksi, jota käytettäessä paperirainan irtoaminen telan pinnasta on hallittua ja telan kestävyys lämpötilaa ja mekaanisia rasituksia vastaan on entistäkin parempi.It is a primary object of the present invention to provide a roll and a method of making the same, in which the release of the paper web from the surface of the roll is controlled and the resistance of the roll to temperature and mechanical stresses is even better.
Edellä olevan päämäärän saavuttamiseksi keksinnön mukainen tela on 20 pääasiassa tunnettu siitä, että pinnoitteen ulkopinta muodostuu kar-bidirikkaista alueista ja näiden välissä olevista matrlisialuelsta.In order to achieve the above object, the roll 20 according to the invention is mainly characterized in that the outer surface of the coating consists of carbide-rich areas and a matrix area between them.
Keksinnön mukainen menetelmä edellä olevien päämäärien saavuttamiseksi on puolestaan pääasiassa tunnettu siitä, että pinnoite muodostetaan jauhees-25 ta, joka muodostuu karbiidirikkaasta jauheesta ja matrllsijauheesta.The method according to the invention for achieving the above objects, in turn, is mainly characterized in that the coating is formed from a powder consisting of a carbide-rich powder and a matrix powder.
Keksinnön mukaista menetelmää soveltaen voidaan käyttää ennestään tunnetulla valutekniikalla valmistettuja telarunkoja päätyineen ja akseli-tappeineen, jolla telarungolla pääasiallisesti saadaan aikaan telan 30 mekaaninen kestävyys, kun taas telan pintaominaisuudet ja pinnan kestävyys saadaan aikaan uudella tavalla.Applying the method according to the invention, roll bodies with ends and shaft pins made by a prior art casting technique can be used, which roll body mainly provides the mechanical strength of the roll 30, while the surface properties and surface resistance of the roll are achieved in a new way.
Keksinnön mukainen tela voidaan valmistaa useilla erilaisilla menetelmillä, joita on kuvattu FI-patentissa 70273 ja Fl-patenttihakemuksessa 35 853544.The roll according to the invention can be manufactured by several different methods, which are described in FI patent 70273 and F1 patent application 35 853544.
3 80097 1 Karbidipinnoitteen tehtävänä on erityisesti toimia telan puristuspinta-na, jonka erikoispiirre on hyvät paperirainan irrotusominaisuudet.3 80097 1 The purpose of the carbide coating is in particular to act as a pressing surface for the roll, a special feature of which is the good peeling properties of the paper web.
Irroitusominaisuudet perustuvat karbidipinnoitteen ominaisuuksiin, jotka 5 ovat mikrohuokoisuus, pieni kitka, pinnan sopiva karheus ja näiden säilyminen .The release properties are based on the properties of the carbide coating, which are microporosity, low friction, suitable surface roughness and their retention.
Seuraavassa keksinnön mukaisen pinnoitteen morfologiaa, kemiallista koostumusta ja muita ominaisuuksia selostetaan yksityiskohtaisesti.In the following, the morphology, chemical composition and other properties of the coating according to the invention are described in detail.
1010
Keksinnön mukainen telapinnoite muodostuu karbidirikkaista alueista, jotka ovat halkaisijaltaan noin 10-50 ^um sekä halkaisijaltaan noin 10-50 ^um olevista matriisialueista näiden välissä. Karbidialueissa karbidit ovat noin 0,5-10 ^um:n kokoisia ja karbidien osuus n. 50-95 %.The roll coating of the invention consists of carbide-rich regions of about 10 to 50 microns in diameter and matrix regions of about 10 to 50 microns in diameter therebetween. In the carbide regions, the carbides are about 0.5 to 10 microns in size and the proportion of carbides is about 50 to 95%.
15 Matriisialueella esiintyy myös karbideja, mutta ne ovat submikroskoop-pisia kooltaan noin 0,001-0,01 ^um, joiden osuus valhtelee välillä 5-50 tilavuus-%. Osa karbideista on vielä erkautumatta ja hiili lujittaa matriisia lluoslujitusmekanlsmllla. Karbidialueiden osuus valhtelee käyttötarkoituksen mukaan. Kun osuus on pieni, noin 5-20 tilavuus-%, 20 pinnoite on pehmeämpi ja sitkeämpi kuin silloin kun osuus on suuri, esim. 70-95 tilavuus-%, jolloin kovuuden ja haurauden mukana kasvaa abrasiivinen kulumiskestävyys. Esim. G-telan wolframikarbidipinnalla karbidialueiden osuus on sopivasti 20-30 tilavuus-%.Carbides are also present in the matrix region, but are submicroscopic in size from about 0.001 to 0.01 μm, ranging from 5 to 50% by volume. Some of the carbides have not yet precipitated and the carbon strengthens the matrix by a solution reinforcement mechanism. The proportion of carbide areas varies according to the intended use. When the proportion is small, about 5-20% by volume, the coating is softer and tougher than when the proportion is large, e.g. 70-95% by volume, whereby the abrasive wear resistance increases with hardness and brittleness. For example, on the tungsten carbide surface of the G-roll, the proportion of carbide regions is suitably 20-30% by volume.
25 Kemiallisesti telapinnoite on wolframin, kromin ja hiilen seos tai wolframikarbidin, wolframin, koboltin, kromin ja hiilen seos. Koostumuksen ainesosien prosenttiosuudet ovat matriisialueella suuruusluokkaa W 70-88 paino-%, edullisesti 81 paino-%, Co 7-13 paino-%, edullisesti 10 paino-%, Cr 4-10 paino-%, edullisesti 4 paino-%, C 4-8 paino-%, 30 edullisesti 4-5 paino-%. Karbidirikkaalla aluella koostumuksen ainesosat ovat prosenttiosuuksiltaan suuruusluokkaa WC 70-95 paino-%, edullisesti n. 85 % (esim. 86 %), Co 7-13 paino-%, edullisesti 10 %, Cr 4-8 paino-%, edullisesti n. 5 % (esim. 4 %). Wolframikarbidien koostumus muodostuu erilaisista karbideista, joiden prosenttiosuudet on suuruusluokkaa 35 wc 30-100 %, edullisesti 50 %, WC^ 0-50 %, edullisesti 40 %, W2C 0-30 %, edullisesti 10 %. Matriisialueella koostumus vastaa keskimääräistä koostumusta, mutta osa hiilestä on sitoutunut submikroskooppi-siin karbideihin ja osa on liuenneena metallimatrlisissa.25 Chemically, a roll coating is a mixture of tungsten, chromium and carbon or a mixture of tungsten carbide, tungsten, cobalt, chromium and carbon. The percentages of the ingredients of the composition in the matrix range are of the order of W 70-88% by weight, preferably 81% by weight, Co 7-13% by weight, preferably 10% by weight, Cr 4-10% by weight, preferably 4% by weight, C 4 -8% by weight, preferably 4-5% by weight. In the carbide-rich range, the ingredients of the composition are in the range of the order of 70-95% by weight WC, preferably about 85% (e.g. 86%), Co 7-13% by weight, preferably 10%, Cr 4-8% by weight, preferably n. 5% (e.g. 4%). The composition of tungsten carbides consists of various carbides in percentages of the order of 35 wc 30-100%, preferably 50%, WC 2 0-50%, preferably 40%, W 2 0-30%, preferably 10%. In the matrix region, the composition corresponds to the average composition, but some of the carbon is bound to submicroscopic carbides and some is dissolved in the metal matrices.
4 80097 1 Pinnan karheutta säädellään pinnoitteen huokoisuuden, karbidien koon ja viimeistelyhionta-asteen avulla. Huokoisuuteen vaikutetaan pinnoitus-parametreilla. Huokoisuuden lisääntyessä pinnan karheus lisääntyy. Karbidien koon määrää pääasiassa jauheen, josta pinnoite muodostetaan, 5 karbidien koko. Pinnoitusparametreillä voidaan vain vähän pienentää karbi-dikokoa. Karbidikoon kasvaessa kasvaa myös pinnan karheus. Viimeistely-hionnalla vaikutetaan pinnan karheuteen hiomalla pinnassa olevien karbidien huiput pois ja näin pienennetään pinnan karheutta samalla ja samalla hioutuvat makroskooppiset epätasaisuudet pois. Tavoitepinnan kar-10 keus riippuu käyttötarkoituksesta, kun halutaan lisätä kitka- ja irro-tusominaisuuksia, valitaan suurempi pinnan karheus esim. 1-2 ^um ja kun halutaan korostaa pientä kitkaa ja kuluttavuutta pinnan karkeus on esim. R 0,2-1 ,um. a / 15 Pinnoitteen kovuus on suurempi kuin 1000 HV 300 ja sen sisäinen lujuus 2 on suurempi kuin 100 N/mm .4 80097 1 The surface roughness is controlled by the porosity of the coating, the size of the carbides and the degree of finishing. Porosity is affected by coating parameters. As the porosity increases, the surface roughness increases. The size of the carbides is mainly determined by the size of the carbides of the powder from which the coating is formed. The coating parameters can only slightly reduce the carbide size. As the carbide size increases, so does the surface roughness. Finishing grinding affects the surface roughness by grinding off the peaks of the carbides on the surface and thus reduces the surface roughness while at the same time grinding away the macroscopic irregularities. The roughness of the target surface depends on the intended use, when it is desired to increase the friction and release properties, a higher surface roughness is selected, e.g. 1-2 μm, and when it is desired to emphasize low friction and wear, the surface roughness is e.g. R 0.2-1 μm. . a / 15 The hardness of the coating is greater than 1000 HV 300 and its internal strength 2 is greater than 100 N / mm.
Keksinnön mukaisen telan pinnoite valmistetaan jauheesta, jonka ominaisuuksia käsitellään yksityiskohtaisesti seuraavassa.The coating of the roll according to the invention is made of a powder, the properties of which are discussed in detail below.
2020
Jauhe muodostuu karbidirikkaasta jauheesta ja matriisijauheesta. Jauheen hiukkaskoko on 5-50 ^um, jakauma riippuu menetelmästä ja on esim.: < 45 ^um 99 %, < 20 ^um 20 % ja < 15 yum 7 %. Mitä lyhyempi altistusalka lämmölle tai matalampi pinnoituslämpötila sitä pienempi hiukkaskoko.The powder consists of a carbide-rich powder and a matrix powder. The particle size of the powder is 5-50 μm, the distribution depends on the method and is e.g. <45 μm 99%, <20 μm 20% and <15 μm 7%. The shorter the initial exposure to heat or the lower the coating temperature, the smaller the particle size.
25 Pulverin pitää kuitenkin olla riittävän suurta, jotta sitä voitaisiin syöttää pinnoituslaitteessa. Lisäksi vaikuttaa hiukkasten pinta-ala; mitä suurempi se on sitä tehokkaampi on kuumeneminen. Jauheen hiukkasissa olevien karbidien koko vaihtelee käyttötarkoituksen mukaan ja on 1-10 ^um pinnan karheusvaatimuksesta riippuen. Karbidikoko 1 ^um vastaa 30 pinnan karheutta noin 0,5 ^um ja karbidikoko 3 ^um vastaa pinnan karheutta noin 1,5 ,um R . Matriisijauhe on valmistettu sulasta nopeastiHowever, the powder must be large enough to be fed into the coating machine. In addition, the surface area of the particles is affected; the higher it is the more effective is the heating. The size of the carbides in the powder particles varies depending on the application and is 1-10 depending on the surface roughness requirement. A carbide size of 1 μm corresponds to a surface roughness of about 0.5 μm and a carbide size of 3 μm corresponds to a surface roughness of about 1.5 μm R. The matrix powder is made from the melt quickly
/ S/ S
jähmettämällä (rapid solidification-tekniikka) siten, että hiili jää rakenteeseen submikroskooppisiksi karbideiksi ja/tai liuenneena metalli-matriisiin. Karbidihiukkasten muoto pinnoitteessa ja jauheessa on pyö-35 reä. Jauheen kemiallinen koostumus vastaa pinnoitteen koostumusta.by solidification (rapid solidification technique) so that the carbon remains in the structure as submicroscopic carbides and / or dissolved in a metal matrix. The shape of the carbide particles in the coating and the powder is round. The chemical composition of the powder corresponds to the composition of the coating.
Matriisi voi olla kiteinen, amorfinen tai kiteisen ja amorfisen aineen rakenteen seos.The matrix may be crystalline, amorphous or a mixture of crystalline and amorphous material structure.
5 80097 1 Jauhe (matriisipulveri) valmistetaan esim. jauhatus-sintraus- ja rouhinta-teknlikalla (milling-sintering and crushing). Pinnoittaminen suoritetaan ennestään tunnetuilla menetelmillä esim. nauhahitsauksella, termisesti ruiskuttamalla, valamalla, kiertämällä sylinterin ympärille sintrattua 5 ja/tai valssattua nauhaa tai telapinnolte aikaansaadaan käyttämällä taipuisaa mattoa, joka sulautetaan kiinni telan runkoon induktio-, laser- tai muuta sopivaa kuumennusta käyttäen. Näitä menetelmiä on yksityiskohtaisesti selostettu hakijan FI-patentissa 70273) ja FI-hakemuk-sessa 853544. Kun pinnoite tehdään ruiskuttamalla, se tehdään ruiskutit) tamalla kahta jauhekomponenttia, jotka ovat a) karbidi ja sidosmetalli ja b) matriisimetalli.5 80097 1 Powder (matrix powder) is produced, for example, by milling-sintering and crushing technology. The coating is carried out by methods known in the art, e.g. strip welding, thermal spraying, casting, wrapping around the cylinder sintered and / or rolled strip, or the roll coating is obtained by using a flexible mat fused to the roll body by induction, laser or other suitable heating. These methods are described in detail in the applicant's FI patent 70273) and FI application 853544. When the coating is made by spraying, it is done by spraying two powder components, which are a) carbide and bonding metal and b) matrix metal.
Pinnoite on kostutus- ja pintajännitysominaisuuksiltaan lähellä perinteisesti ko. telassa käytetyn graniitin ominaisuuksia.The coating is traditionally close to its wetting and surface tension properties. properties of the granite used in the roll.
1515
Karbidiplnnoltteen pitkän aikavälin toimivuuden turvaa suuren kovuuden (1100 HV) aikaansaama hyvä kulumiskestävyys ja seostukseen perustuva hyvä korroosionkestävyys. Molemmat säilyttävät rainan Irtoamiselle olennaiset mikrohuokoisuuden ja pinnan karheuden. Alkuperäinen mikrohuokoisuus-20 taso voidaan säätää plnnoltusprosessln parametreillä.The long-term performance of the carbide plug is ensured by the good wear resistance provided by the high hardness (1100 HV) and the good corrosion resistance based on the alloy. Both retain the microporosity and surface roughness essential for web release. The initial microporosity level of 20 can be adjusted with the parameters of the design process.
Karbldiplnnoitus kestää myös tulevaisuudessa paperikoneolosuhtelssa ennustettavat muutokset, jotka ovat korroosiorasitus ja suurenevat lämpötilat, täyteainepitoisuudet ja kasvavat viivakuormat. Pinnoitus 25 kestää myös lämpöshokkitilanteet.The carbide plating will also withstand predictable changes in paper machine conditions in the future, which include corrosion stress and increasing temperatures, filler concentrations, and increasing line loads. Coating 25 is also resistant to thermal shock situations.
Keksintöä valaistaan lisäksi eeuraavien esimerkkien ja kuvioiden avulla.The invention is further illustrated by the following examples and figures.
30 Hakijan koekoneessa tehtyjen koeajojen perusteella karbidipinnoitteelle todettiin pienet irtoamiskulmat ja pienet irrotusvoimat muihin testipin-tolhln verrattuna.30 Based on the test runs performed on the applicant's test machine, low release angles and low release forces were observed for the carbide coating compared to the other test surfaces.
Kuvio kuvaa rainan irtoamiskulmia rainan ja telan välisen nopeuseron funktiona paperikoneen nopeuden ollessa 18 m/s.The figure illustrates the web release angles as a function of the speed difference between the web and the roll at a paper machine speed of 18 m / s.
6 80097 1 Esimerkkej ä6 80097 1 Examples
Koekoneessa suoritettiin koeajoja seuraavilla teloilla 5 1. A Vanha kit'itela 2. B Ketallitela 3. C Konventionaalinen polymeeritela 4. D Keksinnön mukainen tela 10 paperikoneen nopeudella 18 m/s. Kuviossa tulokset on rekisteröity ralnan irrotuskulmina rainan ja telan välisen nopeuseron funktiona. Kuviosta näkee, että karbidipinnoitteella D on parhaat irtoamisominaisuudet, koska tietyllä vetovoimalla rainan irtoamispiste on aikainen (pieni kulma). Koeajojen yhteydessä mitattiin myös suhteelliset irrotustyöt.Test runs were performed on the test machine with the following rolls 5 1. A Old kit roll 2. B Ketall roll 3. C Conventional polymer roll 4. D Roll 10 according to the invention at a paper machine speed of 18 m / s. In the figure, the results are recorded as the separation angles of the web as a function of the speed difference between the web and the roll. It can be seen from the figure that the carbide coating D has the best release properties because at a certain attraction the release point of the web is early (small angle). Relative removal work was also measured in connection with the test runs.
15 Tulokset on nähtävissä taulukossa 1. Karbidipinnoitteen D irrotustyö on vain n. 40 % vertailutelan A irrotustyöhön nähden.15 The results can be seen in Table 1. The removal work of the carbide coating D is only about 40% of the removal work of the reference roll A.
Taulukko 1 20 Suhteellinen irrotustyön arvo Wg eri teloilla: W 2Table 1 20 Relative value of removal work Wg on different rollers: W 2
Teoria: T = _ + mv l-cos0Theory: T = _ + mv l-cos0
oc W Woc W W
Λ Vertailuksi saadaan: sa = sb l-cos0 l-cos0. a b W:n arvot koeajotulosten perusteella: 30Λ For comparison, we get: sa = sb l-cos0 l-cos0. a b W values based on test run results:
Tela WTela W
A 1 B 0,64 D 0,41 11 35 1 Seuraavassa esitetään patenttivaatimukset, joiden määrittelemän keksin nöllisen ajatuksen puitteissa yksityiskohdat voivat vaihdella.A 1 B 0.64 D 0.41 11 35 1 The following are claims which, within the scope of the inventive idea defined by them, may vary in detail.
7 80097 5 10 15 20 25 30 357 80097 5 10 15 20 25 30 35
Claims (23)
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI882006A FI80097B (en) | 1988-04-28 | 1988-04-28 | VALS I PRESSPARTIET AV EN PAPPERSMASKIN OCH FOERFARANDE FOER FRAMSTAELLNING AV DENNA. |
| EP89850134A EP0341229B1 (en) | 1988-04-28 | 1989-04-26 | Roll in the press of a paper machine and a method for the manufacture of the roll |
| AT89850134T ATE124739T1 (en) | 1988-04-28 | 1989-04-26 | ROLLER FOR THE PRESS SECTION OF A PAPER MACHINE AND METHOD FOR PRODUCING THE ROLLER. |
| DE68923321T DE68923321T2 (en) | 1988-04-28 | 1989-04-26 | Roller for the press section of a paper machine and method for producing the roller. |
| CN89102875A CN1015119B (en) | 1988-04-28 | 1989-04-28 | Press roll for paper machine and manufacturing method thereof |
| US07/345,353 US4989306A (en) | 1988-04-28 | 1989-04-28 | Roll for directly contacting a web |
| US07/598,923 US5167068A (en) | 1988-04-28 | 1990-10-16 | Method for manufacturing a roll directly contacting a web |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI882006A FI80097B (en) | 1988-04-28 | 1988-04-28 | VALS I PRESSPARTIET AV EN PAPPERSMASKIN OCH FOERFARANDE FOER FRAMSTAELLNING AV DENNA. |
| FI882006 | 1988-04-28 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| FI882006A0 FI882006A0 (en) | 1988-04-28 |
| FI882006L FI882006L (en) | 1989-10-29 |
| FI80097B true FI80097B (en) | 1989-12-29 |
Family
ID=8526373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI882006A FI80097B (en) | 1988-04-28 | 1988-04-28 | VALS I PRESSPARTIET AV EN PAPPERSMASKIN OCH FOERFARANDE FOER FRAMSTAELLNING AV DENNA. |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4989306A (en) |
| EP (1) | EP0341229B1 (en) |
| CN (1) | CN1015119B (en) |
| AT (1) | ATE124739T1 (en) |
| DE (1) | DE68923321T2 (en) |
| FI (1) | FI80097B (en) |
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH674381A5 (en) * | 1988-04-13 | 1990-05-31 | Sulzer Ag | |
| US5401232A (en) * | 1989-01-09 | 1995-03-28 | Valmet Paper Machinery, Inc. | Rolls and cylinders for use in paper machines |
| FI83439C (en) * | 1989-08-24 | 1991-07-10 | Valmet Paper Machinery Inc | Roll in paper machine and process for making it |
| FI84506B (en) * | 1990-02-22 | 1991-08-30 | Tampella Oy Ab | PRESSVALS FOER PAPER MASKIN. |
| US5171404A (en) † | 1990-11-30 | 1992-12-15 | S. D. Warren Company | Method and apparatus for calendering paper with internally heated roll |
| EP0561391B1 (en) * | 1992-03-18 | 1998-06-24 | Hitachi, Ltd. | Bearing unit, drainage pump and hydraulic turbine each incorporating the bearing unit, and method of manufacturing the bearing unit |
| US5458460A (en) * | 1993-03-18 | 1995-10-17 | Hitachi, Ltd. | Drainage pump and a hydraulic turbine incorporating a bearing member, and a method of manufacturing the bearing member |
| US5334288A (en) * | 1992-09-09 | 1994-08-02 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Press roll in a paper machine |
| TW383233B (en) * | 1995-01-31 | 2000-03-01 | Rieter Ag Maschf | Thread guiding elements |
| US5785636A (en) * | 1995-10-12 | 1998-07-28 | Beloit Technologies, Inc. | Composite roll shell |
| US5813962A (en) * | 1996-06-28 | 1998-09-29 | Kawasaki Steel Corporation | Forged roll for rolling a seamless steel pipe |
| DE69809992T2 (en) | 1997-04-11 | 2003-07-24 | Metso Paper, Inc. | Roller for a paper or board machine and method for manufacturing the roller |
| EP1739231A1 (en) * | 2005-07-02 | 2007-01-03 | M-real Oyj | Cast coating device |
| DE102005044099A1 (en) * | 2005-09-15 | 2007-03-29 | Andritz Küsters GmbH & Co. KG | Heatable calender roll |
| EP1860235A1 (en) | 2006-05-23 | 2007-11-28 | M-real Oyj | Coated paper with improved labelling properties |
| JP5039346B2 (en) * | 2006-09-12 | 2012-10-03 | 株式会社フジミインコーポレーテッド | Thermal spray powder and thermal spray coating |
| DE102011082234A1 (en) * | 2011-09-07 | 2013-03-07 | Voith Patent Gmbh | Machine and method for producing a single-layer or multi-layer fibrous web made of cardboard or packaging paper |
| DE102012205206A1 (en) * | 2012-03-30 | 2013-10-02 | Voith Patent Gmbh | roll cover |
| CN104334796B (en) * | 2012-04-27 | 2017-06-13 | 福伊特专利公司 | For manufacture and/or the roller of the press section of the machine of refined fiber web |
| EP2994572B1 (en) * | 2013-05-06 | 2017-10-18 | Voith Patent GmbH | Roll |
| EP3317456A1 (en) * | 2015-07-02 | 2018-05-09 | Voith Patent GmbH | Component for a machine for producing and/or treating a fibrous web and method for producing a coating of a component |
| CN106676452A (en) * | 2016-12-28 | 2017-05-17 | 东莞理文造纸厂有限公司 | Process for improving hardness and abrasion resistance of calendering roll |
| DE102021105618A1 (en) * | 2021-03-09 | 2022-09-15 | Voith Patent Gmbh | scraper blade and roller device |
| DE102023113184A1 (en) * | 2023-05-19 | 2024-11-21 | Sms Group Gmbh | Work roll for rolling a metallic product, rolling stand, metallic strip, method for producing a work roll and use of a work roll |
| DE102023113183A1 (en) * | 2023-05-19 | 2024-11-21 | Sms Group Gmbh | Work roll for rolling a metallic product, rolling stand, metallic strip, method for producing a work roll and use of a work roll |
| DE102023113186A1 (en) * | 2023-05-19 | 2024-11-21 | Sms Group Gmbh | Work roll for rolling a metallic product, rolling stand, metallic strip, method for producing a work roll and use of a work roll |
| DE102023113185A1 (en) * | 2023-05-19 | 2024-11-21 | Sms Group Gmbh | Work roll for rolling a metallic product, rolling stand, metallic strip, method for producing a work roll and use of a work roll |
| DE102023113182A1 (en) * | 2023-05-19 | 2024-11-21 | Sms Group Gmbh | Work roll for rolling a metallic product, rolling stand, metallic strip, method for producing a work roll and use of a work roll |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4793041A (en) * | 1979-05-03 | 1988-12-27 | Jerome D. Jenkins | Transfer roll with ceramic-fluorocarbon coating containing cylindrical ink holes with round, beveled entrances |
| FR2493191A1 (en) * | 1980-10-31 | 1982-05-07 | Usinor | CASTING COLD ROLLING CYDINDER AND MANUFACTURING METHOD THEREOF |
| CA1213096A (en) * | 1980-12-04 | 1986-10-21 | Masayoshi Suguri | Press roll and manufacturing method therefor |
| WO1983000883A1 (en) * | 1981-09-04 | 1983-03-17 | Yabuki, Ritsue | Heat- and abrasion-resistant tough nickel-based alloy |
| JPS59197307A (en) * | 1983-04-22 | 1984-11-08 | Hitachi Ltd | Roll for rolling mill |
| US4697320A (en) * | 1984-06-28 | 1987-10-06 | Hitachi, Ltd. | Roll for a rolling mill, method of producing the same and the rolling mill incorporating the roll |
| FI70273C (en) * | 1985-01-09 | 1986-09-15 | Valmet Oy | SYNTHETIC PRESS RELEASES FOR THE FRAMEWORK OF THE FRAMEWORK |
| US4856161A (en) * | 1985-01-09 | 1989-08-15 | Valmet Oy | Press roll |
| FI853544L (en) * | 1985-09-16 | 1987-03-17 | Valmet Oy | PRESSVALS OCH FOERFARANDE FOER FRAMSTAELLNING AV DENNA. |
| US4794680A (en) * | 1985-12-20 | 1989-01-03 | Union Carbide Corporation | Novel wear-resistant laser-engraved ceramic or metallic carbide surfaces for friction rolls for working elongate members, method for producing same and method for working elongate members using the novel friction roll |
-
1988
- 1988-04-28 FI FI882006A patent/FI80097B/en not_active Application Discontinuation
-
1989
- 1989-04-26 EP EP89850134A patent/EP0341229B1/en not_active Expired - Lifetime
- 1989-04-26 AT AT89850134T patent/ATE124739T1/en not_active IP Right Cessation
- 1989-04-26 DE DE68923321T patent/DE68923321T2/en not_active Expired - Fee Related
- 1989-04-28 US US07/345,353 patent/US4989306A/en not_active Expired - Lifetime
- 1989-04-28 CN CN89102875A patent/CN1015119B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE68923321D1 (en) | 1995-08-10 |
| CN1037371A (en) | 1989-11-22 |
| FI882006A0 (en) | 1988-04-28 |
| FI882006L (en) | 1989-10-29 |
| DE68923321T2 (en) | 1995-11-09 |
| ATE124739T1 (en) | 1995-07-15 |
| EP0341229A3 (en) | 1991-07-31 |
| EP0341229A2 (en) | 1989-11-08 |
| US4989306A (en) | 1991-02-05 |
| EP0341229B1 (en) | 1995-07-05 |
| CN1015119B (en) | 1991-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FI80097B (en) | VALS I PRESSPARTIET AV EN PAPPERSMASKIN OCH FOERFARANDE FOER FRAMSTAELLNING AV DENNA. | |
| FI70273B (en) | SYNTHETIC PRESS RELEASES FOR THE FRAMEWORK OF THE FRAMEWORK | |
| FI101556B (en) | Paper machine press roller | |
| CA2028335C (en) | Roll for use in the production of paper and method for the manufacture of the roll | |
| US4748736A (en) | Method for manufacturing a press roll | |
| JP2703406B2 (en) | Paper processing method and apparatus using inner heating roll | |
| CA1260303A (en) | Press roll for paper machines | |
| CA1146817A (en) | Transfer roll | |
| US6240639B1 (en) | Fluid metering roll and method of making the same | |
| US5167068A (en) | Method for manufacturing a roll directly contacting a web | |
| WO2007135231A1 (en) | A static dewatering element for a web forming machine and a method for covering a static dewatering element designed for a web forming machine | |
| AU2013328653B2 (en) | Method of manufacturing rotogravure cylinders | |
| US6339883B1 (en) | Method of making a roll for paper-making machine | |
| US4856161A (en) | Press roll | |
| US5235747A (en) | Method of manufacture of a roll for use in paper production | |
| US20030092549A1 (en) | Coating rod for paper manufacturing machines | |
| JPH07111036B2 (en) | Method for manufacturing press roll for paper machine | |
| JPH05179596A (en) | Rolls for paper machines | |
| CN1008890B (en) | Casting Method of Composite Tungsten Carbide Particles on Cylindrical Surface | |
| FI85998B (en) | VALS I PAPPERSMASKIN OCH FOERFARANDE FOER FRAMSTAELLNING AV VALSBELAEGGNING. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FC | Application refused |
Owner name: VALMET PAPER MACHINERY INC |